Allylation of the radical generated from alpha-silyl-alpha-phenylselenoacetic esters with various allyltributyltin substrates led to good yields of the corresponding homoallylsilanes. A study on the nature of the radical thus generated was performed using comparative allylation rates with electronically different allyltributyltin compounds. Finally, these homoallylsilanes were converted into the corresponding homoallylic-1,2-diols after reduction of the ester function and oxidation of the C-Si bond.
Sequential iodine-mediated diallylsilane rearrangement/asymmetric dihydroxylation: Synthesis and reactions of enantioenriched oxasilacycles
作者:Christopher R. Myers、Paul Spaltenstein、Lauren K. Baker、Cody L. Schwans、Timothy B. Clark、Gregory W. O'Neil
DOI:10.1016/j.tetlet.2021.153392
日期:2021.10
Products from an iodine-mediated diallylsilane rearrangement were taken into an asymmetricdihydroxylation (AD) reaction resulting in the formation of diastereomeric 6-membered oxasilacycles. Removal of the epimeric stereocenter among this mixture of diastereomers by elimination of iodine produced a single enantioenriched cyclic allyl silyl ether. The resulting allyl silane was then successfully engaged
[EN] PROCESS TO RECOVER 3-METHYL-BUT-3-EN-1-OL<br/>[FR] PROCÉDÉ DE RÉCUPÉRATION DE 3-MÉTHYL-BUT-3-ÉN-1-OL
申请人:BASF SE
公开号:WO2020187953A1
公开(公告)日:2020-09-24
The presently claimed invention relates to a process for the recovery of 3-methyl-3-buten- -ol from a stream comprising (Z)-3-methylpent-2-ene-1,5-diol, (E)-3-methylpent-2-ene-,5-dioland 3-methylenepentane-1,5-diolby treating the stream with isobutene and water.
Studies in marine cembranolide synthesis: A synthesis of 2,3,5-trisubstituted furan intermediates for lophotoxin and pukalide
作者:Ian Paterson、Gardner Mark、Bernard J Banks
DOI:10.1016/s0040-4020(01)81102-9
日期:1989.1
Pd(0)-catalysed coupling between various furyl zinc or tin compounds and vinyl iodides is demonstrated to be a versatile method for the synthesis of 2,3-dialkyl-5-alkenylfurans like 3, as potential precursors of the ring system of lophotoxin and pukalide. A possible cyclisation substrate was successfully prepared by glycol cleavage, 21 → 24, when alcohol oxidation failed.